No-start countdown on the dash? We can usually get to you today. Call 07503 134362
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Open fuel flap showing the diesel cap and the blue AdBlue (DEF) filler cap
Off-road, motorsport and export

Diesel Exhaust Fluid Bypass

Diesel Exhaust Fluid (DEF) is another name for AdBlue. If the DEF/SCR system on an off-road, motorsport or export vehicle keeps faulting, we bypass it at the ECU so the warnings, countdown and limp mode stop. Mobile across Stoke-on-Trent, Staffordshire and Cheshire.

From £150, quoted per job Open 7 days, 09:00–20:00 Abid comes to you
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Supplied for off-road, motorsport and export vehicles. If yours is used on the road, we will fix the fault properly instead, and it is often less than people expect. See AdBlue repair.

What it involves

DEF and AdBlue are the same thing

Diesel Exhaust Fluid is the general name; AdBlue is the brand name used on most UK vehicles. It is the same urea solution and the same SCR system.

A DEF bypass reprograms the engine ECU so it no longer relies on that system, done in the software rather than with an emulator box. Your original ECU file is stored first. If your vehicle is used on the road, we will fix it properly with an AdBlue repair instead.

Technician at the open door of a white van with a diagnostic tablet, a container of AdBlue on the pavement
How it works

How it works

A clean, one-visit job at your home or workplace.

1

We come to you and diagnose

We plug in at your home or work and read exactly what is triggering the AdBlue warning, countdown or limp mode.

2

We explain your options

You get the cause, the options and the price before any work starts. No surprises, no pressure.

3

We carry out the work

We do the job on the spot wherever possible, on your drive or at your workplace.

4

We clear and road-test

Codes cleared, warning off and the vehicle driving normally before we leave.

When it is considered

When a DEF bypass is considered

P20EE / P207F

SCR efficiency and AdBlue quality codes that keep coming back.

No-start countdown

"Starts remaining" messages before the vehicle locks out.

Limp mode

Power capped because the SCR system has flagged a fault.

NOx sensor faults

Upstream or downstream sensor errors and repeat warnings.

Pump and heater faults

AdBlue will not dose, or freezes in winter.

Off-road, motorsport, export

Vehicles that never go on a UK public road.

Real jobs

What we read on site

Real fault codes from AdBlue systems we have diagnosed.

Why us

Why choose AdBlue Specialist

AdBlue specialists

Focused on AdBlue, SCR, NOx and EGR faults on cars and vans, not a general garage guessing at it.

Fully mobile

We come to your home or work across Stoke, Staffordshire and Cheshire. No need to drop the vehicle anywhere.

Diagnose before we act

We prove the fault on the tablet first, so you only pay for what your vehicle actually needs.

Original file saved

Your factory ECU file is stored before any software work, so it can be put back if you ever need it.

Same-day, often

Off a flashing warning or countdown? We will usually get you booked in the same or next day.

Clean hand-back

We road-test and confirm a clear dashboard and normal driving before we leave.

Prices

Ask about a DEF bypass

Prices start From £150

Send your reg, postcode and how the vehicle is used, and we will tell you the right route and the price before any work starts. Prices start from £150.

Questions

DEF bypass: your questions

Is DEF the same as AdBlue?

Yes. DEF (Diesel Exhaust Fluid) and AdBlue are the same urea solution used by the SCR system.

Do you use emulator boxes?

No. We make the change in the ECU software, which avoids the faults that plug-in emulators often cause.

Will it pass an MOT?

Road vehicles must keep their emissions system working, so for those we repair the fault. A DEF bypass is for off-road, motorsport and export use.

Is it reversible?

Yes. We read and store your original ECU file before any changes, so the vehicle can be returned to standard.

My vehicle is used on the road. What should I do?

We will diagnose the fault and quote for a proper repair. It is often less than people expect.

Do you come to me?

Yes. We are fully mobile across Stoke-on-Trent, Staffordshire and Cheshire.

AdBlue warning on the dash?

Call or WhatsApp Abid and get it sorted, usually the same day.

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